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### Comparison of Offline and Online Modes

Since both the Online and Offline modes of PC-DMIS share the same features and functions, this documentation describes the use of both products. However, in some instances, a particular feature of the software in Online mode does not apply to the software in Offline mode. These cases have been noted where appropriate.

Offline Measurement Routine Programming

You can use PC-DMIS in Offline mode to develop and debug measurement routines away from the CMM by editing a part created in Online mode, by importing a CAD input file, or through a DMIS or AVAIL measurement routine. You can then directly execute the measurement routine in Online mode, or export (post processed) into DMIS or one of several vendor-specific formats. You cannot directly drive a CMM in Offline mode.

To start PC-DMIS in Offline mode, do the following:

1. Turn on your computer and all its peripherals, and log on to your computer.

2. Double-click with the left mouse button on the Offline icon in the PC-DMIS Program Group.

3. Use PC-DMIS to program your part's measurement routines. If you are new to PC-DMIS, see "A Simple Tutorial" in the PC-DMIS CMM documentation for help.

The "Working in Offline Mode" appendix describes the particulars of working with PC-DMIS in Offline mode.

Online Measurement Routine Programming

You can use PC-DMIS in Online mode to execute measurement routines, quickly inspect parts (or sections of parts), and develop measurement routines directly on the CMM. PC-DMIS in Online mode does not function unless it is connected to a CMM or other measuring device. Offline programming techniques work in Online mode.

To start PC-DMIS in Online mode, see the "Getting Started" chapter in the PC-DMIS CMM documentation. It covers the CMM startup and homing processes.